Re: [Tutor] hasattr()
Thank you xDog and Steven. The whole assignment makes a lot of sense now after your explanations of what hasattr is doing. Thanks ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] hasattr()
On 14/10/12 05:29, Matthew Ngaha wrote: im trying to understand this hasattr function. i am supposed to pass in an object and an attribute name into its parametres... so im trying to get it to return True. Here's a quick test class Test: def __init__(self): self.att = "testing" Okay, so you have a class that defines an attribute named "att". e = Test() hasattr(e, e.att) False Break this down step by step. First you create an instance, "e", with an attribute e.att. Python evaluates e.att to get the string "testing", then looks up hasattr(e, "testing"). Does e have an attribute called "testing"? No. So it returns False. hasattr(e, "testing") False Same here, except that you bypass the evaluation of e.att and enter the string "testing" manually. What you need to pass to hasattr (as well as its friends getattr and setattr) is the *name* of the attribute, not its contents: hasattr(e, "att") will return True. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] hasattr()
On Saturday 2012 October 13 11:29, Matthew Ngaha wrote: > >>> hasattr(e, e.att) > > False >>> hasattr(e, "att") True hasattr wants the second parameter to be a string. You gave it a string. The string you gave it was "Testing". -- Yonder nor sorghum stenches shut ladle gulls stopper torque wet strainers. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] hasattr()
im trying to understand this hasattr function. i am supposed to pass in an object and an attribute name into its parametres... so im trying to get it to return True. Here's a quick test class Test: def __init__(self): self.att = "testing" >>> e = Test() >>> hasattr(e, e.att) False >>> hasattr(e, "testing") False what can i do to make this True? my e object has an attribute att but it returns False. Any code showing it return True? the task i have been set is very difficult but i don't want to ask for help just yet, i think understanding how hasattr works might make everything else clear. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor